"""
用来打印是否包含嵌套列表的列表
"""
import sys
def print_lol(the_list,indent=False, level=0, fn=sys.stdout):
    for each_item in the_list:
        if isinstance(each_item, list):
            print_lol(each_item, indent, level+1, fn)
        else:
            if indent:
                for tab_stop in range(level):
                    print("\t", end='', file= fn)
            print(each_item,file=fn)